Carbureter.



L. R. MILLER, JR.

OARBURETBR.

APIPLIOATION TILED mm 14, 1913.

Patented May 5, 1914,

WITNESSES ATTORNEYS LEWIS R. MILLER; R, .101" nonen e m. xans'asf 1 CAR- onfire; I

' Application filed June 7 '0 all whom it may concern:

Be it known that I, LnwIs R. ,MILLER, Jr.., a citizen of the United States, and a resident of Dodge City, in the county of .Ford and State of Kansas, have invented a new and useful Improvement in Carbureters, of

. which the following is a specification.

My invention is an improvement in carbureters, and has for its object to'provide a carbureter having a movable mixing tube so shaped and moved that it acts as a throttle, and is connected to the usualthrot tle operating mechanism, and operatedin the same manner as the throttle is operated.

In the drawings :-Figure' 1 is alongitudinal vertical section 'of the improved car-.

bureter, Fig. 2 is a side view showing the throttle lever shaft and its connections, Fig.

3 is a perspective View of the throttle lever shaft and its connections detached, and Fig. 4 is a perspective view of the mixing tube and screen.

The present embodiment of the invention comprises a cylindrical casing 1, having a base flange 2, provided. with the usual openings 3 for receiving holding bolts or the like,

to secure the casing in place.

The gasolene'supply pipe 4 is connected to a nipple 5. at the center on a cover plate 6, which fits within the open top of a valve casing 7, forming an extension from thecasing 1 and connected thereto at the lower end by ap'ipe 8, and at the upper endby a 7 the said float being connected to a needle valve stem 12, whose lower end is reof the casing 7, and the upper end. of the stem is pointed or conical and cooperates larly arranged series of air inlet openings with a conical seat at the inner end of the nipple 5, thus controlling the admission of "the gasolehe to the casin .7. The casing 1 is provi led with an annu- 46, below the inlet end of the tube 9, and

' the mixing tube 16- is arranged the cas.

' i Specification lit-Letters Patent.- 14,1913.

. ceived in a recess in a boss 13 on the bottom .Serial no. 772 3559., 1 T

ing 1, theend of the tube having alateral annular flange 16*; A tubular body 17 is-fitted within thecasing 1, between the mixing tube and the inner wall 3 of the said casing l. The ends of the-said tubular body'areflanged laterally asindicatedat 18, and the lower flange is rabbeted For closing thesame.v

The body of the mixing tube 16 fits within the said tubular body and the said mixing tube is provided with an annularseries to fit against the lower end of thetube 1., v

of openings 19, which are adapted to covided with alateral inlet '21, at the level of the openings 20, the said inlet being the hot operate with a. similar series of openings 20 in the tubular body. The casing 1 isproair inlet of the carbureter. A gasolene cup.

22 is arranged within the lower end of the tubular body, the upper end of the said cup I fitting withinthe lower end of the mixing tube 15, but being spaced apart. from the wall thereof, as shown. The said cup is ex tendedbelow the tubular body 17, and a drain valve 23 is connected with the said lower'end- The pipe 8 before mentioned, opens into the bore of they gasolene cup, by

means of radial passages 24, and the said cup is provided with an annular rib'25, ar- 5 ranged between the-lower end of the tubu-' lar body .17 and-the end of the pipe SQ'T-he said pipe is provided with a sleeve 26, at its lower end, whiclris coaxial with the-casing l, and the rlb 25 fits'the-space between the r said sleeve and the tubular body.

A pipe 27 is arranged at the axis eithe casing. 1,'the said pipe extending through,

the mixing tube and into thefu'pp'er end of thegasolene cup. and at its-lower end the.- pipe is closed but'is provided with a serieso t', perforations above the :closed end as shown. 'forpermitting the passage of the air from the pipe. The upper end of the pipe has a" lateral extension '28, passing through the wall of the casing 1, and at its outer end the saide'xten sion-is provided with a conical cap 29. arranged above a plug 30, secured to the upper end of a rod 31, which is; mounted for vertical slidingmovement m a bearing lug 32, extendlng laterally fronrthe casin'g l. Just below the plug a nut :01-

'w asher 33-is threaded onto the rod 31'. and

the said nut or washer-extends beyond the side wall of the plug 3Q,and is adapted to engage the under free end of the cap 29 to close the inlet to the pipe 27 28.. .The

' plug is conical to fitthe cap, and as the said plug is spaced below the cap, so will the amount of air entering the pipe 2728 be regulated. I I v I The throttle lever 34 is connected to a stub shaft35, journaled ina bearing 36 on I Y :the casing 1, at the junction of the inlet 21 therewith, and a cam to be described,'1s

- connected with the'said shaft,'the said cam with theshaft 35, and a resilient extension:

37 extending substantially circumferential- A, i to the shaft .35 in spaced relation and having 3 tation atits inner end in the sl1'aft;3'5 ,.and

coliperating with the lower end of the-rod .31. Radial arms 34 rigid with the shaft I shoulder 48, against which the annular flange 16 at the upper end of the mixing tube abuts when the said tube is in its highest position. The shoulder thus limits. the upward movement of the tube. The rod 31 is normally pressed downward by a coil I 7 spring 38, arranged between the bearing lug 32 and an annular rib orcollar 39*on the said rod. The cam before mentioned, comprises a radial lug or body portion 37 rigid at the free end thereof an internalthreaded nut 40. A set screw 41 is-journaled for ro- -'the said nut 40 is threaded onrto the'set -.cam is constant a'tthe lug 37 but by movingstands. at the level indicated by the dotted screw. By turning the set screw in the proper direction, the eccentricity of thecam,

consisting'of the extension and the lug, may be varied. The amount of eccentricity of the the nut 40 toward or from the shaft 35, the

extent of op'eningof the air inlet for the high speed adjustment may be varied Ito cause the-said inlet to open more .or'v less qwidely. Y

The'gasolene is fed to the extension ing 7 by means of the pipe 4,, and normally lines in the said casing. When. the gasolene falls below this level, the float 11 moves the pipe 8 intothe bore of the gasolene' clip, by means of the radial passages24, and.

downwardly, thus lowering the needle valve: to permit more fuel to enter throughthe.

boss 5. The gasolene flows down through passes upwardly into the enlarged. or counter-bored upper end of the bore to the level indicated by the before mentitmed dottedlines. It will be noticed that the said line is just below the upper edge of the 'gasolene cup, and 'ust above the uppermost perforations in t e air inlet tube 27 Thus the air atthis point. is moved forwardly, to lower thev mixing. tube 16, to cause the openings 19 of the said 1 tube to partly-register with the openings '20, heated air is admitted tothe mixing .tube, the amount depending uponthe extent entering through the inlet end of the said tube is discharged below the level of the gasolene in the. asolene cup, and the said air bubbles up tirough the gasolene, causing a film of the same to be discharged over the outside of the said cup.

The mixing tube 16 may be lowered by means of the throttle lever, to cause the series 19 ofopenings in the mixing tube to register with the series .20 of the tubular structure 17, in which the mixing tube moves, whereby to admit more or less heated air through the inlet 21 to the interior of the mixing tube. This heated air passes upwardly in intimate contact wit-h the film of 'gasolene, before mentioned, thus carrying a considerable portion of gasified fuel into the mixing tube. The gasifiedfuel mixed with the heated air passes upwardly through the mixing SE56 into the upper part of the casing 1, and through a screen tube 44, open at its lower end, and closed at its top, as indicated at 45.. Any gasolene that may collect on the inner wall of the mixing tube finds its way to the screen tube 44 and is vaporized by the air admitted through theopening 46 above the flange 16 of the mixing tube. 1

The plug 30 is spaced apart from the conical cap 29 a sufficient distance to permit some air to enter the air inlet tube.

that is, inthe position it occupies when the engine is not running, the extent of open-. ing of the auxiliary air inlet may be adjust-ed to suit conditions by turning the plug and thewasher 33 on the stem to move them bywa'rd or from the ca 29. The amount of air-admitted on the hlgh speed may be ad- 'justed by means. ofthe set screw 4-1. It will be evidentjirom the description that The farther forward the throttle lever is moved, the more widely is the air inlet opened. With the throttle lever in normal position,

the vaporizing nozzle is arranged between"- the throttle'and the engine, that is, the

throttle is arranged'to control the admisthe engine. The latter arrangement is necessarily faulty, since it merely controls the amount of mixture admitted to the engine without controlling, vaporizing and .sionof air both heated and atmospheric to Y the'mixing tube instead :of arranging the said throttle between the mixing tube and regulating the constitution of the said mixture as does thepresent arrangement;

lnoperat-ion, the gasolene standsat the level-of; the dotted line in the gasolene cup,

the float 1'1 bein arranged to hold the level en the throttle lever 34 of movement of the throttle lever.

- bubbles.

As before stated, the atmospheric air enters the gasolene in the cup below the level of the same, thus causing the gasolene to foam and to flow out over the upper end of the tube in a thin film filled with air The heated air easily vaporizes this gasolene and the mixture is drawn by the suction of the engine through the screen 44 and into the engine.

When the throttle lever is opened wider, the openings 19 register with the openings 20 to a greater extent, while at the sametime the extent of opening of the auxiliary air inlet, that is, the amount of auxiliary air admitted, depends upon the arrange. ment of the cam 37. This cam may be arranged to admit a greater quantity of auxiliary or atmospheric 'air as the speed increases.

The suction of the engine has no effect upon the gasolene level in the gasolene cup, since it does not draw through the gasolene cup but around the same. Neither is there any tendency of the gasolene to flow downwardly into the mixing tube on account of the partial vacuum obtaining in the car-' bureter through the suction of the engine,

the tube 9 counteracting this. tendency. It will be evident that the air will be rarefied as greatly above the gasolene in the extension casing 7 as'it will above the gasolene in the gasolene cup. In addition the air is admitted through the annular series of openings 46 just below the shoulder 43, so that when the mixing tube is lowered, these openings are also opened. The greater the extent of opening of the mixin tube the greater the air that may flow in t rough the opening 46. Thus, the amount of mixture as well as the constitution of the said mixture is regulated by the throttle. \Vhen it is desired to admit a larger amount of gas to the engine, the throttle lever 34 is moved to the right of the drawing, thus moving the mixing tube to its lowest extent and opening the openings 46 completely as well as causing the openings 19 to register with the openings 20,

The auxiliary air inlet at the cap 29 will also be opened to its greatest extent. Thus the air will rush through the pipe 27, causing violent bubbling of the gasolene in the gasolene cup. while at the same time, the heated air will rush in through the openings 19 and 20, catching up and vaporizing the gasolene, which is drawn through the mixing tube and mixed with the atmospheric air through the openings 46. Such portions of the gasolene as-are not vaporized are caught by the screen 44, and vaporized by the airs-admitted through openings 46. The said screen is' a retainer-for the gasolene in liquid form. The tubular body 17 is a guidesleev'e for the mixing tube, airanged between the. said tube and the casing 1.

lene is subjected to the most violent action of the said air as it rushes into the mixing tube. On this account a much better vaporization of the fuel is attained. The auxiliary airinlet through the tube 2728 assists 1n vaporizing the gasolene as it drives it out over the upper end of the gasolene cup. It will be noticed that thereis suflicient space for the downward movement of the mixing tube between the guide sleeve and the gasolene cup. The first downward movement of the with respect to the mixing tube 16, by means of a spider 47. The top 45 of the tube 44 is also of perforate material, so that all of the fuel passing into the casing l is thoroughly strained by the said tube.

I claim '80 mixing tube permits some air to enter 1. A carbureter comprising a casing of cylindrical form having its lower end inter-- nally enlarged or counterbored to form an annular shoulder between the said enlargement and the body of the casing, said casing having an annular series of air inlet openings in the counterbored portion at the shoulder and having a hot air inlet opening in the counter-bored portion beyond thesaid openings, a guiding sleeve in the counterbored ort-ion at the air inlet opening, said sleeve having at each end an annular rib engaging the inner surface of the counterbored portion, said ribs being on opposite sides of the hot air inlet, said sleeve having an annular series of openings at the said inlet, a gasolene cup in the lower end of the guide tube and extending above the series ofopenings, a mixingtube mo-vable'in the guide sleeve and having an annular series of openings for registering with the openings of the sleeve, said mixing tube having an annular marginal rib at its upper end for contacting with the shoulder of'the casing when the openings of the tubes are out of register with the openings of the sleeve, an air inlet tube extending through the mixing tube into the gasolene cup, means in connection with the carburetor for retaining the gasolene at a predetermined level in the gasolene cup, said. air inlet tube having perforations below the level of the gasolene, a throt-' tle lever connected with the mixin tube for. moving the same, the air inlet tu e having an extension outside the casing provided with a conical seat at its inlet end ac'oni ca] valve cooperatingwith the seat, a cam for operating the said valve, a rigid connecspace between the casing and the sleeve at tion between the throttle lever and the cam, and means for varying the eccentricity of the cam.

2. A carbureter comprising a casing of cylindrical form having its lower end internally enlarged or (-ounterbored to form an annularshoulder between the said enlarge ment and the body of the casing, said casing having an annular series of air inlet openings in the eounterbored ortion at the shoulder and having a hot air inlet opening in the counterbored portion beyond the said openii'igs. a guiding sleeve in the counterbored portion at the air inlet opening, said sleeve having at each end an annular rib engaging the inner surface of the eounterboi ed portion, said ribs being on opposite sides of the hot air inlet, said sleeve having an annular series of o 'ienings at the said inlet, a gasolene cup in the lower end oi the guide tube and extending above the series of openings, a mixing tube movable in the guide sleeve and having an annular series of openings for registering with. the openings of the sleeve, said mixingtube having an annular marginal rib at itsfupper end for contacting with the shoulder of the casing when the openings of the tube are out of register with the openings of the sleeve, an air inlet tube extending through the mixing tube into the gasolene cup, means in connection with the carbureter for retaining the gasolene at a predetermined level in the a'asolcne cup, said air inlet tube having perforations below the levelof the gasolene, a throttle lever connected with the mixing tube for moving the same, the air inlet tube having an extension outside the casing provided with a conical seat at its inlet end, a conical valve coiiperating with the seat a cam for operating the said valve, and a rigid connection between the throttle lever and the cam.

3. A carburetorromprising a casing having an annular internal shoulder intermediate its ends and having an annularseries of openings below the said shoulder, a mix ing tube in the casing having an annular rib fitting against the shoulder, a guide sleeve for the tube in the casing, said sleeve having annular ribs at each end contacting with the inner surface of the casing and closing the each end of the sleeve, said casing having a hot air inlet intermediate the ends of the sleeve and the. sleeve and the mixing tube having annular series of openings out of register when the mixing tube is in engagement with the shoulder, a gasolene cup in the Lower end of the guide sleeve, means for retaining gasolene at a predeterminedlevel in the cup, said level being just below the upper end of the cup, an auxiliary air tube passing through the mixing tube and extending below the level of the gasolene therein,.s aid'tube being perforated below thesaid 1 tube longitudinally and for regulating the level, said tube extending outside the casing, a valve for closing the inlet end of the said tube, a stem to which the valve is conneeted, a spring normally holding the said valve open, a throttle lever connected with the mixing tube for moving the same longitudinally, a cam rigid with the shaft and engaging the valve stem for opening the valve when the throttle is open, and means for varying the eccentricity of the cam for the purpose specified.

t. A carburetor comprising a casing having an annular internal shoulder interme diate its ends and having an annular series of openings below the said shoulder, a mixing tube in the casing having an annular rib fitting against the shoulder, a guide sleeve for the tube in the casing, said sleeve having annular ribs at each end contacting with the inner surface of the casing and closing the space ibetween the casing and the sleeve at each end of the sleeve, said casing having a hot air inlet intermediate the ends of the sleeve and the sleeve and the mixing tube having annular series of openings out of register when the mixing tube is in engagement with the shoulder, a gasolene cup in the lower end of the guide sleeve, means for retaining gasolene at a. predetermined level in the cup, said level being just below the upper end of the cup, an auxiliary air tube passing through the mixing tube and extending below the level of the gasolene therein, said tube being perforated below the said level, said tube extending outside of the easing, a valve cooperating with the inlet end of the tube for varying the amount of air admitted thereto, and -a common means for moving the mixing tube longitudinally of the casing and for operating the said valve.

A carbureter comprising a casing, a mixing tube in the casing, a guide sleeve for the tube in the casing, said sleeve engaging the casing at each of its ends, the casing having a hot air inlet intermediate the ends of the sleeve and the sleeve having air openings arranged in annular form at the said inlet, a mixing tube movable longitudinally of the sleeve and having air inlet openings adapted to register with those of the sleeve, said casing having an annular series of air inlet openings below the upper end of the tube when the said tube is in its uppermostposition, said tube closing the upper end of the casing from the said inlet openings when in uppermost position, a gasolene cup in the lower end of the guide sleeve, means in connection with the casingfor holding the gasolene at. a predetermined level in the cup, said cup extending above the inlet openings of the sleeve,an auxiliary air tube opening below the level of the gasolene in the on and having perforations below the said evel, and a common means for moving'the mixing amount of air admitted'through the auxiliary air tube.

6. A carbureter comprising a casing having a lateral hot air inlet, a gaso-lene cup in the casing, means for supplying gasolene to the said cup and for retaining the gasolene at a predetermined level in the cup, a mixing tube movable longitudinally of the easing, a guide sleevebetween thetube and the casing and having an inlet opening at the hot air inlet, said mixing tube having an opening for registering therewith when the tube is in its lowermost position, means for supplying atmospheric air to the gasolene cup below the level of the gasolene for forcing the gasolene over-the edge of the cup, the hot air inlet bein at the upper end of the said cup, means or controlling the air admitted to the gasolene cup, and a common meansyfor controlling the movement of the mixing tube and the said regulating means, the casing having supplementary air inlet openings uncovered by the mixing tube when it moves downward.

7. A carbureter comprising a casing having a lateral hot air inlet, a gasolene cup in the casing, means for supplying gasolene to the said cup and for retaining the gasoleneat a predetermined level in the cup, a mixing tube movable longitudinally of the casing, a guide sleeve between the tube and the casing and having an inlet opening at the hot air admitted to the gasolene cup, and a common means for controlling the movement of the mixing tube and the said regulating means.

8. A carbureter comprising a casing having a lateral hotair inlet, a gasolene cup in the casing, means for supplying gasolene to the said clip and for retainin the gasolene at a predetermined level'in t e cup, a mixing tube movable longitudinally of the easing, a guide sleeve between the tube and they casing and having an inlet opening at the hot air' inlet, said mixing tube having an opening for registering therewith when the tube is in its lowermost position, means for supplying atmospheric air to the gasolene cup below the level of the gasolene for forcing the gasolene over the edge of the cup,

and a common means for controlling the movement of the mixing tube and the air supplying means to the gasolene cup.

9. A; carburetor comprising a mixing tube having air, inlet oppnmgs intermediate its ends, a guide sleeve aving air inlet openings intermediateitsends, the mixing tube being movable in the guide sleeve to causethe openfor registering therewith when the ings thereof to register with the openings of the guide sleeve, a gasolene cup supported within the guide tube at its lowerend, the upper end of the cup being above the level of the inlet openings of the said guide sleeve, means for retaining gasolene at a predeter mined level in the cup' and just below the top thereof, means for admitting air to the said cup below the level of the gasolene, a casing in which the guide sleeve is fixed, said casing having an inlet for hot air at'theopenings of the guide tube-and having lateral inlets for 'air normally closed by the mixing tube when the openings thereof are" out of register with the, openings of the guide sleeve, said casing communicating with the engine at the end remote from the gasolene, cup, a retainer of perforate material between .the guide sleeveand the engine, and a common means for, moving the mixing tube in the guide sleeve and :for controlling the ad mission of air to the gasolene in the cup;

10. A carbureter comprising a mixing tube having air inlet openings intermediate its ends, a guide sleeve having air inlet openings lntermediate 1ts ends, the mixlng tube being movable in the guide sleeve to'cause the openings thereof to registerwith the opening of the guide sleeve, a gasolene cup supported within the guide tube at its lower end, the upper end of the cupbeing above the level of the inlet opening of the said guide sleeve, means for retaining gasolene at v a predetermined level in the cup and 'justbelow the top thereof, means for admitting air to" the said cup below the level of, the gasolene, means for conducting. the mixture from the upper end of the tube to the engine, and a common means for: moving the mixing tube and for controlling the supply of air to the gasolene in the cup.

' "11. A carbureter comprising a casing adapted to be connectedwith the engine at one end and having alateral inlet or, hot air near the other end, a mixing tube movabI M1 the casing and closing the same at its upper end,-said tube having a lateral inlet opening for registering with the lateral inlet of the casing, a gasolene cup within the lower-end of the mixing tube, means for retaining gasolene at a predetermined level in the. cup, means for supplying air below the level of the gasolene, the casing having air inlets closed by the mixing tube when the inletopening thereof is out of register with the inlet opening of the casing, and a common means for-moving the mixing tube and for controlling the supply of air admitted to the gasolene cup.

12. A carbureter comprising a casing adaptedto be connected with the en ine at one endand having a lateral inlet or hot air nearthe other end, a mixing tube movable in the Teasing and closing the same at its upper end, said tube havinga lateral in let opening for registering with the lateral inlet of the casing, a gasolene cup within the lower end of the mixing tube, means for retaining gasolene at a predetermined level in the cup, means for supplying air below the level of the gasolene, and a common means for moving the mixing tube and controlling the amount of air admitted to the gasolene cup, and a retainer of perforate material in the casing between the upper end of the mixing tube and the firstnamed end of the casing.

-13. A carbureter comprising a casing adapted to be connected with the engine at one end and having a lateral inlet for hot air near the other end, a mixing tube movable in the casing and closing the same at its upper end, said tube having a lateralinlet opening for registering with the lateral inlet of the casing, a gasolene cup within the lower end of the mixing tube, means for retaining gasolene at a predetermined level in the cup, means for supplying air below the level of the gasolene, and a common means for moving the mixing tube and controlling the amount of air admitted to the gasolene cup. 3

14;. In a carbureter, a container for gasolene, means for retaining a predetermined amount of gasolene in the container, means for supplying air to the container below the level of the gasolene for driving the gasolene over the upper edge of the container, a mixing tube encircling the container and movable longitudinally thereof, a casing inclosing the tube and the container, and having a lateral inlet for hot air, the mixing tube having an inlet for registering with the inlet of the casing,,and a'common means for moving the tube and for controlling the air supplied to the container.

15. In a carbureter, a guide sleeve having a gasolene receptacle, a mixing tube movable in the guidesleev'e, said tube and sleeve having lateral inlets adapted to register with each other, means for retaining the gasolene at a predetermined level in the receptacle,

means for supplying airto the receptacle below the level ofthe gasolene, a valve forcontrolling the supplying means, a cam for closing the valve, and a common means for moving the mixing tube to bring the inlets in register with each other and for operatmg the cam, and means in'connection with the caangifer varying the eccentricity thereof at a predetermined level in the receptacle,

means for supplying air to the receptacle below the level of the gasolene, means for simultaneously moving the tube to bring the inlets of the tube and sleeve into register and for regulating the amount of air admitted to the cup, and means in connection with the said means for varying the relative speed of movement ofthe tube with respect to the amount of air admitted.

17. In a carbureter, a guide sleeve having a gasolene receptacle, a mixing tube mov able in the guide sleeve, said tube and sleeve having lateral inlets adapted to register with each other, means for retaining the gasolene at a predetermined level in the receptacle, means for supplying air to the receptacle below the level of the gasolene, and means for simultaneously moving the tube to bring the inlets of the tube and sleeve into-register and for regulating the amount of air admitted to the receptacle.

18. In a carbureter, a guide sleeve having a gasolene receptacle, a mixing tube movable in the guide sleeve, said tube and sleeve having lateral inlets adapted to register with each other, means for retaining the gasolene at a predetermined level in the receptacle, a casing for connection with the engine inclosing the guide sleeve and having a hot air inlet at the inlet openings of the sleeve, means for supplying air below the level of the gasolene, and a common means for controlling the movement of the tube and the said supplying means.

19. In a carbureter, a guide sleeve having a gasolene receptacle, a mixing tube movable in the guide sleeve, said tube and sleeve having lateral inlets adapted to register with each other, means for supplying air to the gasolene below the level thereof, and a common means for moving the tube and for regulating the said air supplying means.

LEWIS R. MILLER, JR. 

